Question

我在尝试从已检查checkbox es获取值时遇到问题。我可以从radio button获取一个值，但我无法从复选框中获取值。

代码

<html>
<head>
    <script language="javascript">

        function subscription() {
            var subamount = document.querySelector('input[name="sublvl"]:checked').value;
            $('input:checked').each(function () {
                // To pass this value to its nearby hidden input
                $(this).parent('td').next('input').val($(this).val());
            });

            alert(subamount);
        }

    </script>
</head>
<body>
    <h3>
        <span style="color: #ff0000;">Step 1: Choose your donation amount</span></h3>
    <form name="pclvl" action="#" method="get">
    <label>
        <input type="radio" name="sublvl" value="10" />
        Pathfinder Chronicler Supporter $10.00 USD</label>
    <br>
    <label>
        <input type="radio" name="sublvl" value="15" />
        Pathfinder Chronicler Bronze Supporter $15.00 USD</label>
    <br>
    <label>
        <input type="radio" name="sublvl" value="20" />
        Pathfinder Chronicler Silver Supporter $20.00 USD</label>
    <br>
    <label>
        <input type="radio" name="sublvl" value="30" />
        Pathfinder Chronicler Gold Supporter $30.00 USD</label>
    <br>
    <label>
        <input type="radio" name="sublvl" value="40" />
        Pathfinder Chronicler Platinum Supporter $40.00 USD</label>
    <br>
    <label>
        <input type="radio" name="sublvl" value="45" />
        Pathfinder Chronicler Jewel Supporter $45.00 USD</label>
    <br>
    <label>
        <input type="radio" name="sublvl" value="50" />
        Pathfinder Chronicler Diamond Supporter $50.00 USD</label>
    <br>
    </p>
    </form>
    <h3>
        <span style="color: #ff0000;">Step 2: Choose your donation reward</span></h3>
    <p>
        <form name="donations" action="#" method="get">
        <input type="checkbox" name="reward" value="1" />
        Vol. I Package ($10 value) A print copy of Pathfinder Chronicler Volume I (shipping
        charges not included)<br />
        <input type="checkbox" name="reward" value="2" />
        Vol. II Package ($10 value) A print copy of Pathfinder Chronicler Volume II (shipping
        charges not included)
        <br />
        <input type="checkbox" name="reward" value="3" />
        Vol. III Package ($10 value) A print copy of Pathfinder Chronicler Volume III (shipping
        charges not included)
        <br />
        <input type="checkbox" name="reward" value="4" />
        Vol. I Package + Vol. I Poster ($15 value) A print copy of Pathfinder Chronicler
        Volume I with a 11x17 Poster of Volume I Source Art by Eva Widermann (shipping charges
        not included)<br />
        <input type="checkbox" name="reward" value="5" />
        Vol. II Package + Vol. II Poster ($15 value) A print copy of Pathfinder Chronicler
        Volume II with a 11x17 Poster of Volume II Source Art by Carolina Eade (shipping
        charges not included)<br />
        <input type="checkbox" name="reward" value="6" />
        Vol. III Package + Vol. III Poster ($15 value) A print copy of Pathfinder Chronicler
        Volume II with a 11x17 Poster of Volume III Source Art by Carolina Eade (shipping
        charges not included)<br />
        <input type="checkbox" name="reward" value="7" />
        Complete Package ($50 value) Print copies of Pathfinder Chronicler Volume I, II
        and III with 11x17 Posters of Volume I, II, III, and IV Source Art, by Eva Widermann
        and Carolina Eade (shipping charges not included)<br />
        <input type="checkbox" name="poster" value="poster" />
        Poster Package ($20 value) 11x17 Posters of Volume I, II, III, and IV Source Art,
        by Eva Widermann and Carolina Eade (shipping charges not included)<br />
    </p>
    <input type="button" value="test click" onclick="subscription(this.form)">
    </form>
</body>
</html>

Answer 1

如果你打算使用jQuery，也可以坚持使用jQuery。我提供了大量的评论，因为你已经离开网络编程一段时间了，可能会使用复习。

修改：刚看到您的修改，已更改为获取复选框

function subscription() {

    // Create an array of checkbox inputs that are checked
    var $inputs = $('input[type="checkbox"]:checked');

    // Iterate through all the checked inputs, you could use
    // jQuery's $each here but it's horribly slow
    for (var i = 0; i < $inputs.length; i++) {

        // Assign the value
        var inputValue = $($inputs[i]).val();

        // Please note I cannot see the hidden field on your markup, but let's
        // just target the first hidden field available if that is what you want
        // If you include the hidden field on the markup, we could target it
        // specifically also...
        $('input:hidden').val(inputValue);

    }
}

使用javascript从复选框中获取值

1 个答案: